JP3087337B2 - Pulse height analyzer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pulse height analyzer for counting a peak value of a signal, and more particularly, to an emission spectrometer for analyzing elements in a sample using microwave induced plasma. The present invention relates to a pulse height analyzer which is attached to a PID and is capable of taking in time information when a peak value is detected.

[0002]

2. Description of the Related Art A conventionally known pulse height analyzer is a pulse height analyzer for one channel.
In the case of the above, the configuration was as follows. That is, the signal for the first channel is sent to the determination unit for the first channel, the signal for the second channel is sent to the determination unit for the second channel, and the signal for the third channel is sent to the determination unit for the third channel. Sent out. Further, a peak value and a count number are obtained from the outputs of the first to third channel determination units.

On the other hand, a multi-channel pulse height analyzer has the following configuration. That is, the signal for the first channel, the signal for the second channel, and the signal for the third channel are sent to one multi-channel determination unit, and the peak value and the count number are obtained from the output of the multi-channel determination unit. Was to be asked. In the multi-channel determination section, the number of channels is to be limited.

However, in such a conventional example, the peak height in each channel can be counted, but there is no time information, so that there is a drawback that the correlation for each channel is unknown.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned drawbacks of the prior art, and an object of the present invention is to provide a method in which, when there are many channels, one peak is used for another channel. It is an object of the present invention to provide a pulse height analyzer capable of easily discriminating whether or not there is a correlation with the pulse height analyzer.

[0006]

SUMMARY OF THE INVENTION The present invention is directed to a signal peaking method.
In a pulse height analyzer that counts values,
The sampling clock that sends out the clock signal and this
A counter that increases the count when a clock signal is received.
And a channel signal based on the clock signal.
Signal and the output of the counter and the channel
Signal peak, and this peak and peak were caught
A plurality of channels for outputting the count number corresponding to time.
Output from the channel determination section and the channel determination section.
And outputs the peak and the counted number in association with each other.
And a data knitting unit.
It is a light analyzer.

[0007]

The embodiment of the present invention operates as follows. That is,
First, the internal counters of the judgment units for the respective channels are cleared, and it is judged whether or not a sample clock input at a fixed period (for example, 10 μsec) from the sampling clock is input to these judgment units. If it is determined that the sample clock has not been input, it waits until it is input. If it is determined that the sample clock has been input, the internal counter is incremented.

After that, the channel signal is read and
It is determined whether or not it is a peak, and if it is determined that it is a peak, the internal count and the peak data are stored in the internal memory, and thereafter, it is determined whether or not the measurement is completed. If it is determined that the measurement is not a peak, it is immediately determined whether or not the measurement has been completed. Thereafter, when it is determined that the measurement has not been completed, it is determined again whether or not the sample clock is input from the sampling clock to the channel determination unit. When it is determined that the measurement has been completed, reading is performed from each internal memory of the channel determination unit, and peak data is read in ascending order of time.
Is transferred to a monitor etc. together with the data.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. FIG. 1 is a configuration circuit diagram of an embodiment of the present invention.
1 peak of the signal receives the signals S ₁ for the first channel - first channel for determining unit to capture a click, the 2 peak of the signal receiving a signal S ₂ for the second channel - second channel to capture the click use determination unit, 3 peak of the signal receiving a signal S ₃ for the third channel - third channel for determining portion capture the click, 4 peak of the signal receiving a signal S ₄ for the fourth channel - a click The fourth channel determination section 5 to be captured is a sampling clock for transmitting a clock signal to the first to fourth channel determination sections 1 to 4, and 6 is the first to fourth channel determination sections 1 to 4.
Is a data organizing unit composed of, for example, a microprocessor, which receives the output of (1), edits data of peak and time information, and transfers the edited data to a monitor (not shown).

The first to fourth channel determination units 1 to 4
It is adapted to receive a clock signal sent from the sampling clock 5 to capture the channel signal S ₁ to S _4.

FIG. 2 is a flowchart for explaining the operation of the embodiment of the present invention. The operation of the embodiment of the present invention will be described below with reference to FIGS. In the embodiment of the present invention having the configuration shown in FIG. 1, when a measurement start command is first issued (101 in FIG. 2), the internal counters of the first to fourth channel determination units 1 to 4 are initialized. It is cleared (102 in FIG. 2). Thereafter, it is determined whether or not a sample clock is input from the sampling clock 5 to the first to fourth channel determination units 1 to 4 (10 in FIG. 2).
3).

If it is determined that the sample clock has not been input from the sampling clock 5 to the first to fourth channel determination units 1 to 4, it waits until the sample clock is input.

The first to fourth channel determination units 1 to 4
When it is determined that the sample clock is input to the sample counter 4 from the sample clock 5, the internal counter is incremented (104 in FIG. 2), and for example, n = i is changed to n.
= I + 1.

[0014] Thereafter, the S ₁ for the first channel read (106 in FIG. 2), peak - or click or not is determined (106 in FIG. 2). If it is determined that the measurement is a peak, the internal count (that is, time information) and the peak data are stored in the internal memory (107 in FIG. 2), and thereafter, whether or not the measurement is completed is determined. It is determined (108 in FIG. 2). If it is determined that the measurement is not a peak, it is immediately determined whether or not the measurement has been completed (108 in FIG. 2). When it is determined that the measurement has not been completed, it is again determined whether or not the sample clock from the sampling clock 5 is input to the first to fourth channel determination units 1 to 4 (see 10 in FIG. 2).
3), the operations of 103 to 108 in FIG. 2 are repeated.

When it is determined that the measurement has been completed, reading is performed from each of the internal memories of the first to fourth channel determination units 1 to 4, and the peak data is read in ascending order of time. The data is transferred to a monitor (not shown). Incidentally, when the present inventors conducted experiments using the pulse height analyzer of FIG. 1, the following results were obtained. That is,
2 seconds after the start of measurement, a peak of 5V voltage signal is applied to the second channel.
4 seconds after the start of the measurement, a peak of 3 V was obtained on the third channel, and 6 seconds after the start of the measurement, peaks of 4 V and 6 V were obtained on the first and fourth channels, respectively. . So
Then, in this case, channel 1 and channel 4
And peaks were obtained at the same time,
By transferring the data to the monitor and reading
Judging that there is a temporal correlation between two channels
can do.

The present invention is not limited to the above-described embodiment, but can be variously modified. For example, the judgment unit 1 shown in FIG.
4 may be increased or decreased, and the internal counters of the determination units 1 to 4 may be external counters. Also,
Instead of storing it in the internal memory, it may be stored in an external memory, or when it is determined to be a peak, time information and peak data may be transferred to the data organization unit.

[0017]

According to the embodiment of the present invention as described in detail above, the configuration is such that time information is taken in together with peak data. -Monitor the data, and have the advantage that the relationship between the channels can be understood. Therefore, according to the present invention, one peak
A pulse height analyzer that can easily determine whether a peak is correlated with a peak of another channel is realized.

[Brief description of the drawings]

FIG. 1 is a configuration circuit diagram of an embodiment of the present invention.

FIG. 2 is a flowchart for explaining the operation of the embodiment of the present invention. 1-4 Judgment unit 5 Sampling clock 6 Data organization unit

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G01R 29/02 G01R 19/04 G01N 21/73

Claims (1)

(57) [Claims] In a pulse height analyzer for counting a peak value of a signal, a sampling clock for transmitting a clock signal and a count number when receiving the clock signal are increased.
A counter for receiving the signal for the channel and the output of the counter based on the clock signal, capturing the peak of the signal for the channel, and outputting the peak and the count number corresponding to the time at which the peak was captured. A plurality of channel determining units; and the peak output from the channel determining unit and
A pulse height analyzer comprising : a data knitting section for outputting the counts in association with each other .